| 1 | import { Effect, Predicate, Stream } from "effect" |
| 2 | import type { AiError, IdGenerator, Response } from "effect/ai" |
| 3 | import { LanguageModel } from "effect/ai" |
| 4 | import { dual } from "effect/Function" |
| 5 | |
| 6 | interface WithLanguageModelOptions { |
| 7 | readonly generateText?: |
| 8 | | Array<Response.PartEncoded> |
| 9 | | ((options: LanguageModel.ProviderOptions) => |
| 10 | | Array<Response.PartEncoded> |
| 11 | | Effect.Effect<Array<Response.PartEncoded>, AiError.AiError, IdGenerator.IdGenerator>) |
| 12 | readonly streamText?: |
| 13 | | Array<Response.StreamPartEncoded> |
| 14 | | ((options: LanguageModel.ProviderOptions) => |
| 15 | | Array<Response.StreamPartEncoded> |
| 16 | | Stream.Stream<Response.StreamPartEncoded, AiError.AiError, IdGenerator.IdGenerator>) |
| 17 | } |
| 18 | |
| 19 | export const withLanguageModel: { |
| 20 | (options: WithLanguageModelOptions): <A, E, R>( |
| 21 | effect: Effect.Effect<A, E, R> |
| 22 | ) => Effect.Effect<A, E, Exclude<R, LanguageModel.LanguageModel>> |
| 23 | <A, E, R>( |
| 24 | effect: Effect.Effect<A, E, R>, |
| 25 | options: WithLanguageModelOptions |
| 26 | ): Effect.Effect<A, E, Exclude<R, LanguageModel.LanguageModel>> |
| 27 | } = dual(2, <A, E, R>( |
| 28 | effect: Effect.Effect<A, E, R>, |
| 29 | options: WithLanguageModelOptions |
| 30 | ): Effect.Effect<A, E, Exclude<R, LanguageModel.LanguageModel>> => |
| 31 | Effect.provideServiceEffect( |
| 32 | effect, |
| 33 | LanguageModel.LanguageModel, |
| 34 | LanguageModel.make({ |
| 35 | generateText: (opts) => { |
| 36 | if (Predicate.isUndefined(options.generateText)) { |
| 37 | return Effect.succeed([]) |
| 38 | } |
| 39 | if (Array.isArray(options.generateText)) { |
| 40 | return Effect.succeed(options.generateText) |
| 41 | } |
| 42 | const result = options.generateText(opts) |
| 43 | return Effect.isEffect(result) ? result : Effect.succeed(result) |
| 44 | }, |
| 45 | streamText: (opts) => { |
| 46 | if (Predicate.isUndefined(options.streamText)) { |
| 47 | return Stream.empty |
| 48 | } |
| 49 | if (Array.isArray(options.streamText)) { |
| 50 | return Stream.fromIterable(options.streamText) |
| 51 | } |
| 52 | const result = options.streamText(opts) |
| 53 | return Array.isArray(result) ? Stream.fromIterable(result) : result |
| 54 | } |
| 55 | }) |
| 56 | )) |